Fehling's Solution B (Alkaline)

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FF0050-500ML_U FF0050-1L
470301-096EA 59.65 USD
470301-096 470301-098
Fehling's Solution B (Alkaline)
Chemicals for Science Education
CAS Number: Mixture
Formula Weight: Mixture
Formula: Mixture
Hazard Info: Caustic, Corrosive
Density (g/mL): Approximately 1.1
Boiling Point (°C): Approximately 100
Freezing Point (°C): Approximately 0
Synonyms: Fehling's Alkaline Tartrate Solution
Shelf Life (months): 36
Storage: White

Note: The chemical specifications for some items on this product page may differ from the specifications listed above. For more information, consult the Safety Data Sheet or contact your Ward's representative.

Delivery information: This product is designed for educational and teaching laboratories, and no certificate of analysis is available.




This disposal method is published for your convenience. You MUST have checked with your federal, state, and local regulations before using this method and these methods are only applicable for small laboratory sized quantities.

Use a lab apron, chemical resistant gloves and goggles before following the below method to dispose of hazardous waste.

 1. The concentration of the base should be 1 M or less. Dilute it to this concentration if it is more concentrated. Use a large beaker and place it in a fume hood.
  a. When dissolving a base, heat may be evolved. Ice can be used to help control the heat.
  b. Work with a small amount of base at first, and then scale up.
 2. Slowly add dilute hydrochloric acid to the base until the mixture is neutralized to about a pH of 7.
 3. Pour the final solution down the drain with at least a 20-fold excess of water.

Solution Prep

Add 125 g of potassium hydroxide to 400 ml of DI water. Next, add 173 g of potassium sodium tartrate tetrahydrate. Dilute to a final volume of 500 ml of DI water.